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Imaging energetic electron spectrometer onboard a Chinese navigation satellite in the inclined GEO orbit

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Science China(Technological Sciences) 2018年第12期61卷 1845-1865页

作者： ZOU Hong YE YuGuang ZONG QiuGang CHEN HongFei ZOU JiQing CHEN Jiang SHI WeiHong YU XiangQian ZHONG WeiYing WANG YongFu ZHOU XuZhi hao YiXin CHEN XingRan JIA XiangHong XU Feng Shao SiPei WANG Bo hao xiaoyun ZHANG XiaoXin Institute of Space Physics and Applied Technology Peking University Beijing 100871 China State Key Laboratory of Space Medicine Fundamentals and Application Chinese Astronaut Research and Training Center Beijing 100094 China Shandong Aerospace Electro-technology Yantai 264000 China Key Laboratory of Space Weather National Center for Space Weather Beijing 100081 China

The energetic electron measurement is one of the most important issues to understand dynamics in space physics and the applications for space weather. In this study, the principle and functional components of the imaging energetic electron spectrometer(IES) onboard a Chinese navigation satellite in the inclined GEO orbit(IGSO) was introduced. The IES instrument is developed by the team in Peking University(BeiDa), thus it is named as BD-IES. Based on the pin-hole technique, the instrument can measure 50–600 keV electrons incident from 9 directions over a range of 180° in polar angle. With pulse height analysis(PHA), the spectrum can be determined for each direction. The energy and angular calibrations were performed, which show the good energy and angular characteristics of BD-IES. Monte Carlo simulations show that the anti-proton design of BDIES can effectively decrease the proton contamination on the electron measurements in the inclined GEO orbit. The primary results of BD-IES verify the successful design of this instrument.

关键词： imaging energetic electron spectrometer pin-hole imaging system IGSO satellite

5种秸秆腐熟剂对伊犁州水稻秸秆的腐熟效果研究

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现代农业科技 2024年第4期 86-89,101页

作者：郝晓云于阳沙比尔江·沙比提伊犁哈萨克自治州农村能源环境工作站新疆伊宁835000

为了筛选出适宜在伊犁州推广应用的水稻秸秆腐熟剂,选取5种秸秆腐熟剂,开展了水稻秸秆腐熟效果对比试验。试验中,将各秸秆腐熟剂按照说明进行配制后,分别与水稻秸秆混合均匀装入尼龙袋中,再埋入15 cm土壤中,每隔15 d取样一次,观察水稻... 详细信息

为了筛选出适宜在伊犁州推广应用的水稻秸秆腐熟剂,选取5种秸秆腐熟剂,开展了水稻秸秆腐熟效果对比试验。试验中,将各秸秆腐熟剂按照说明进行配制后,分别与水稻秸秆混合均匀装入尼龙袋中,再埋入15 cm土壤中,每隔15 d取样一次,观察水稻秸秆的颜色、手感变化,并测定水稻秸秆的失重率、纤维素含量以及土壤的pH值、全氮含量、全磷含量、全钾含量。结果表明,农富康秸秆腐熟剂、益加益生物菌肥发酵剂、欧科拜克秸秆腐熟剂3种秸秆腐熟剂促进水稻秸秆腐熟的效果较好。

关键词：秸秆腐熟剂水稻秸秆腐熟效果新疆伊犁

大秦铁路助调台站场表示信息丢失原因分析与优化策略

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铁道通信信号 2024年第7期60卷 40-44页

作者：郝晓昀杨晓生冯振国费振豪卡斯柯信号有限公司上海市铁路智能调度指挥系统工程研究中心北京100070

为满足大秦铁路日益增长的业务需求,基于大秦线运输组织特点和CTC3.0系统数据流原理,结合现场故障排查流程,详细分析调度集中系统中心站场表示信息丢失的原因,最终确定在大秦线数据量瞬时较大的情况下,系统通信组件将数据分成包头、包尾... 详细信息

为满足大秦铁路日益增长的业务需求,基于大秦线运输组织特点和CTC3.0系统数据流原理,结合现场故障排查流程,详细分析调度集中系统中心站场表示信息丢失的原因,最终确定在大秦线数据量瞬时较大的情况下,系统通信组件将数据分成包头、包尾2次发送,导致助调工作站数据解析效率降低,引发中心站场表示信息丢失。为此提出采用合并发送数据帧的方式,提高系统的数据处理能力和整体性能,有效解决中心站场表示信息丢失问题;提出降低数据负载和建立预警机制等策略,进一步提升调度集中系统的稳定性和可靠性。经现场验证,该方法可有效提升大秦铁路的运输效率,为类似重载铁路调度集中系统功能优化提供参考。

关键词：调度集中重载铁路助调台站场表示信息通信组件通信队列进路序列

Performance evaluation of HY-2 series satellites in marine gravity field recovery

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Geodesy and Geodynamics 2024年第4期15卷 397-403页

作者： Ruijie hao xiaoyun Wan Keyan Zhang School of Land Science and Technology China University of Geosciences (Beijing) School of Geospatial Engineering and Science Sun Yat-Sen University

China has successfully launched four Haiyang-2(HY-2) series altimetry satellites. HY-2A has attracted significant attention in gravity field recovery, but the performance of other HY-2 series satellites,including HY-2B/C/D, is seldom discussed. This study evaluated the performance of all the HY-2 series satellites in recovering marine gravity field. First, the crossover discrepancies in sea surface height of the four satellites, HY-2A, HY-2B, HY-2C, and HY-2D, were analyzed to assess their altimetry stability. It was found that HY-2B had the best altimetry quality, followed by HY-2D. Subsequently, different combinations of altimetry data were used to calculate vertical deflections and gravity anomalies in the South China Sea(112°E-119°E, 12°N-20°N). The results showed that combining data from HY-2B, HY-2C, and HY-2D improved the inversion accuracy of gravity anomalies by 0.3 m Gal compared to using HY-2A data alone. HY-2C and HY-2D contributed to enhancing the accuracy of the east component of vertical deflections.

关键词： Satellite altimetry HY-2 Sea surface height Marine gravity field

Mechanisms underlying the role of endoplasmic reticulum stress in the placental injury and fetal growth restriction in an ovine gestation model

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Journal of Animal Science and Biotechnology 2024年第1期15卷 201-217页

作者： hao Zhang Xia Zha Yi Zheng xiaoyun Liu Mabrouk Elsabagh Hongrong Wang Honghua Jiang Mengzhi Wang Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition College of Animal Science and TechnologyYangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture and Agri‑Product Safety Ministry of Education of ChinaYangzhou UniversityYangzhou 225009P.R.China Department of Animal Production and Technology Faculty of Agricultural Sciences and TechnologiesNiğde Omer Halisdemir UniversityNigde 51240Turkey Department of Nutrition and Clinical Nutrition Faculty of Veterinary MedicineKafrelsheikh UniversityKafrelSheikhEgypt Department of Pediatrics Northern Jiangsu People’s HospitalClinical Medical CollegeYangzhou UniversityYangzhou 225001China State Key Laboratory of Sheep Genetic Improvement and Healthy Production Xinjiang Academy of Agricultural Reclamation ScienceShihezi 832000China

Background Exposure to bisphenol A(BPA),an environmental pollutant known for its endocrine-disrupting properties,during gestation has been reported to increase the risk of fetal growth restriction(FGR)in an ovine model of pregnancy.We hypothesized that the FGR results from the BPA-induced insufficiency and barrier dysfunction of the placenta,oxidative stress,inflammatory responses,autophagy and endoplasmic reticulum stress(ERS).However,precise mechanisms underlying the BPA-induced placental dysfunction,and subsequently,FGR,as well as the potential involvement of placental ERS in these complications,remain to be investigated.Methods In vivo experiment,16 twin-pregnant(from d 40 to 130 of gestation)Hu ewes were randomly distributed into two groups(8 ewes each).One group served as a control and received corn oil once a day,whereas the other group received BPA(5 mg/kg/d as a subcutaneous injection).In vitro study,ovine trophoblast cells(OTCs)were exposed to 4 treatments,6 replicates each.The OTCs were treated with 400μmol/L BPA,400μmol/L BPA+0.5μg/m L tunicamycin(Tm;ERS activator),400μmol/L BPA+1μmol/L 4-phenyl butyric acid(4-PBA;ERS antagonist)and DMEM/F12 complete medium(control),for 24 h.Results In vivo experiments,pregnant Hu ewes receiving the BPA from 40 to 130 days of pregnancy experienced a decrease in placental efficiency,progesterone(P4)level and fetal weight,and an increase in placental estrogen(E2)level,together with barrier dysfunctions,OS,inflammatory responses,autophagy and ERS in type A cotyledons.In vitro experiment,the OTCs exposed to BPA for 24 h showed an increase in the E2 level and related protein and gene expressions of autophagy,ERS,pro-apoptosis and inflammatory response,and a decrease in the P4 level and the related protein and gene expressions of antioxidant,anti-apoptosis and barrier function.Moreover,treating the OTCs with Tm aggravated BPA-induced dysfunction of barrier and endocrine(the increased E2 level and decreased P4 level),OS,inflammatory responses,autophagy,and ERS.However,treati

关键词： Autophagy Bisphenol A Endoplasmic reticulum stress Fetal growth restriction Inflammatory responses Sheep

Vanadium Defects Formation Mechanism in Undoped GaN Grown on Silicon

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Journal of Rare Earths 2006年第Z1期24卷 41-44页

作者： Zhao Liwei Liu Caichi Teng xiaoyun hao Qiuyan Sun Shilong Zhang Wei School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China

V defects in GaN layer grown on Si (111) using metalorganic chemical vapor deposition (MOCVD) were investigated by atomic force microscopy (AFM), plan-view transmission electron microscopy (TEM) and energy-dispersive X-ray spectrometer (EDS). Dislocations are the origination of V defects. Stress field around dislocations induce the concentration of C atoms, furthermore, slow growth rate on those {10-11} planes are suggested as being responsible for the initiation of V defects. The formation mechanism of V defects was discussed.

关键词： undoped GaN Vanadium defect dislocation transmission electron microscopy

Huangqi Guizhi Wuwu Decoction suppresses inflammation and bone destruction in collagen-induced arthritis mice

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Chinese Herbal Medicines 2024年第2期16卷 274-281页

作者： Jiamin Bao Yongjia Song Minghui Hang hao Xu Qiang Li Pengyu Wang Tao Chen Mengxiong Xia Qi Shi Yongjun Wang xiaoyun Wang Qianqian Liang School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghai 201203China Longhua Hospital Shanghai University of Traditional Chinese MedicineShanghai 200032China Spine Institute Shanghai University of Traditional Chinese MedicineShanghai 200032China Key Laboratory of Theory and Therapy of Muscles and Bones Ministry of EducationShanghai University of Traditional Chinese MedicineShanghai 201203China Shanghai Research Institute of Acupuncture and Meridian Shanghai University of Traditional Chinese MedicineShanghai 200032China

Objective: Rheumatoid arthritis(RA) is a chronic inflammatory and destructive arthritis, characterized by inflammatory infiltration and bone destruction. Huangqi Guizhi Wuwu Decoction(HGWD) is traditional Chinese medicine, which has been applied in the treatment of RA in clinical. The aim of this study was to investigate the therapeutic effect of HGWD on collagen-induced arthritis(CIA) mouse model.Methods: DBA/1J female mice were used to establish the collagen-induced arthritis(CIA) model. HGWD was administered intragastrically once a day for four weeks starting on the 22nd day after the first immunization. The body weight, hind paw thickness and clinical score were measured every five days. Gait analysis, histopathological staining, enzyme-linked immunosorbent assay(ELISA), ultrasound imaging and micro-computed tomography imaging were performed to determine the effects of HGWD treatment on inflammation and bone structure in this model. Moreover, Real-time PCR and Western blot analysis were used to detect inflammatory factors m RNA and protein levels after HGWD intervention in RAW264.7 cells.Results: HGWD attenuated symptoms of arthritis, suppressed inflammatory synovium area and the serum levels of inflammatory factors, inhibited joint space enlargement in the knee and ankle joints,reduced numbers of osteoclasts, protected bone destruction, as well as improved motor function.HGWD decreased the expression of m RNA for inflammatory factors and the protein expression levels of p-NF-ΚB and IL-17.Conclusion: These results suggested that HGWD suppresses inflammation, attenuates bone erosion and maintains motor function in collagen-induced arthritis mice.

关键词： bone destruction collagen-induced arthritis Huangqi Guizhi Wuwu Decoction inflammation rheumatoid arthritis

Energetic electron detection packages on board Chinese navigation satellites in MEO

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Earth and Planetary Physics 2021年第2期5卷 158-179页

作者： YuGuang Ye Hong Zou Qiu-Gang Zong HongFei Chen JiQing Zou WeiHong Shi XiangQian Yu WeiYing Zhong YongFu Wang YiXin hao ZhiYang Liu XiangHong Jia Bo Wang XiaoPing Yang xiaoyun hao School of Earth and Space Sciences Peking UniversityBeijing 100871China State Key Laboratory of Space Medicine Fundamentals and Application Chinese Astronaut Research and Training CenterBeijing 100093China Shandong Aerospace Electro-technology Yantai Shandong 264000China

Energetic electron measurements and spacecraft charging are of great significance for theoretical research in space physics and space weather applications.In this paper,the energetic electron detection package(EEDP)deployed on three Chinese navigation satellites in medium Earth orbit(MEO)is reviewed.The instrument was developed by the space science payload team led by Peking University.The EEDP includes a pinhole medium-energy electron spectrometer(MES),a high-energy electron detector(HED)based onΔE-E telescope technology,and a deep dielectric charging monitor(DDCM).The MES measures the energy spectra of 50−600 keV electrons from nine directions with a 180°×30°field of view(FOV).The HED measures the energy spectrum of 0.5−3.0 MeV electrons from one direction with a 30°cone-angle FOV.The ground test and calibration results indicate that these three sensors exhibit excellent performance.Preliminary observations show that the electron spectra measured by the MES and HED are in good agreement with the results from the magnetic electron-ion spectrometer(MagEIS)of the Van Allen Probes spacecraft,with an average relative deviation of 27.3%for the energy spectra.The charging currents and voltages measured by the DDCM during storms are consistent with the highenergy electron observations of the HED,demonstrating the effectiveness of the DDCM.The observations of the EEDP on board the three MEO satellites can provide important support for theoretical research on the radiation belts and the applications related to space weather.

关键词： radiation belts energetic electron detection Pin-hole technology Chinese navigation satellites MEO internal charging

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伊犁州直区域秸秆综合利用现状及对策浅析

南方农业 2023年第5期17卷 230-233页

作者：郝晓云伊犁州农村能源环境工作站新疆伊宁835000

近年来,随着秸秆产量过剩和利用效率不高的问题日益突出,有必要加强秸秆资源的综合利用开发,充分挖掘多元化利用价值,以促进农业可持续发展,改善农村环境。新疆维吾尔自治区在秸秆资源利用方面开展了大量工作,尤其是在种养结合、农家肥... 详细信息

近年来,随着秸秆产量过剩和利用效率不高的问题日益突出,有必要加强秸秆资源的综合利用开发,充分挖掘多元化利用价值,以促进农业可持续发展,改善农村环境。新疆维吾尔自治区在秸秆资源利用方面开展了大量工作,尤其是在种养结合、农家肥沤制、秸秆能源化工程建设等方面取得了良好的示范成效。其中伊犁州直区域在秸秆综合利用工作方面取得了一定成效,农作物常年播种面积为5.15×105hm^(2),根据草谷比测算,每年可产生约500万t农作物秸秆,近三年秸秆综合利用率均在86%以上,仍有很大的提升空间。分析新疆伊犁州直区域2019—2021年秸秆综合利用现状及存在的主要问题(秸秆焚烧现象依然存在,秸秆“五料化”利用发展不平衡,缺乏龙头企业或规模企业带动,政策扶持力度不够),提出秸秆综合利用发展的建议:加强监督管理,压实各部门责任;探索多元化利用方式,助推秸秆利用产业化发展;培育壮大本地龙头企业,加大招商引资力度;加大政策支持力度;加强宣传引导。

关键词：秸秆综合利用现状问题对策伊犁哈萨克自治州